Gracias Pascal, activé la depuración y obtengo el siguiente mensaje:
Error al leer de la base de datos
×Debug info: COLLATION 'utf8mb4_bin' is not valid for CHARACTER SET 'utf8'
SELECT * FROM mdl_user WHERE LOWER(username) COLLATE utf8mb4_bin = LOWER(?) AND deleted <> 1 AND mnethostid = ?
[array (
0 => 'admin',
1 => '1',
)]
Error code: dmlreadexception
×Stack trace:
line 486 of /lib/dml/moodle_database.php: dml_read_exception thrown
line 1245 of /lib/dml/mysqli_native_moodle_database.php: call to moodle_database->query_end()
line 1571 of /lib/dml/moodle_database.php: call to mysqli_native_moodle_database->get_records_sql()
line 1543 of /lib/dml/moodle_database.php: call to moodle_database->get_record_sql()
line 4810 of /lib/moodlelib.php: call to moodle_database->get_record_select()
line 4319 of /lib/moodlelib.php: call to get_complete_user_data()
line 143 of /login/index.php: call to authenticate_user_login()
Alguien puede guiarme como resolverlo?
Desde ya muchas gracias